Remote sensing monitoring of the mangrove forests resources of Guangdong Province
Mangrove forests are distributed along the coastlines in tropical and sub-tropical area. Mangrove wetlands are important habitats for ecological species and have many ecological functions such as bank protection, pollution elimination and conservation of biological diversity etc. In China's southern coast and the mouth of the Gulf, there exist a lot of mangroves. Based on the image data from 1990 Landsat-5 TM, 2000 Landsat-7 ETM + and 2008 CBERS-02B CCD, the mangrove wetland resources in recent 18 years in Guangdong Province were monitored, and their temporal and spatial variations were analyzed. The results indicate that the area of the mangrove wetland presents a continuous increase trend, with the area of 7 733. 2 hm2 in 1990, 8 722. 0 hm2 in 2000, 9 593. 3 hm2 in 2008; the decentralized distribution tends to be centralized; and the natural mangroves decreases while the artificial ones increase. The results of this study can provide data of reference for the protection and management of the mangrove wetland for relevant authorities of Guangdong Province.